The research problem of this research was 1). Is flexibility exercises influence to the students ability to roll forward at SMP N 1 Lumar, Bengkayang Regency? The research purpose was to get the result of improving on the effect of flexibility exercises to the students ability to roll forward at SMP N 1 Lumar, Bengkayang Regency. The form of the research was experimental research and the data that used in this research was test. The population of this research was the students of SMP N 1 Lumar, Bengkayang Regency. The sample of this research was the eighth grade students of SMP N 1 Lumar, Bengkayang Regency which number of students 40 students. The instrument that is used in this research was test. The first thing that has been done was (pre-test) to know the students ability to roll forward before given the treatment (before treatment) to the students that has been used as the sample of this research. The research finding shown that the pre-test was 7,725 (the average). The post-test was 8, 97 (the average) so it can called as good category or about 40%. The result of t-test was t arithmetic = 2,161 > t table 2,046. In brief, there is an effect of flexibility exercises to the students ability to roll forward to the students of SMP N 1 Lumar, Bengkayang Regency
